which wheelset are the best?

[ZippIt]

Under all circumstance' date=' and providing you weigh sub 75kgs there is no wheel on the market that can beata mavic Ksyerium. Weights a bit more tha the zipp lasts far longer, The hubs are bullet proof and the rims indestructible.

 

I challenge anyone to prove different....

Shimano suck.... Rims are durable and strong but the hubsare sh*te

Zipp are just too expensive although it must be said there fast

 

[/quote']

 

I would not agree with that at all - ksyriums give alot of problems (rear hub issues, spokes oxidising into rim etc.) they are just very well marketed so alot of people have them

[BikeMax]

 

Under all circumstance' date=' and providing you weigh sub 75kgs there is no wheel on the market that can beata mavic Ksyerium. Weights a bit more tha the zipp lasts far longer, The hubs are bullet proof and the rims indestructible.

 

I challenge anyone to prove different....

Shimano suck.... Rims are durable and strong but the hubsare sh*te

Zipp are just too expensive although it must be said there fast

 

[/quote']

 

I would not agree with that at all - ksyriums give alot of problems (rear hub issues, spokes oxidising into rim etc.) they are just very well marketed so alot of people have them

 

Agree 100% - Ksyriums are all marketing hype, you can do much better for far less cash.

 

[Barend de Arend]

 

Bruce' date=' the test I have seen (http://www.rouesartisanales.com/article-1503651.html) found that tubbies had a RR of between 34 and 53 watt, and the clinchers between 26 and 47, when inflated to the same pressure. They do not list any numbers for tubbies inflated to a higher pressure than the clinchers. They only state that tubbies with a hard casing showed a dramatic improvement in RR when inflated over 140 psi.

 

Based on their test data, it does look like clinchers have got a slightly lower RR at the same pressure, but no conclusion can be made for  tubbies inflated to their max rating.

 

Have you got some better data?

[/quote']

 

Increased pressure does decrease rolling resistance, but only on a smooth road, or wood track.

 

On rough road, like SA (also called chipseal in the states, I believe), pumping any tire to too high a pressure increases your rolling resistance again, because every time your tire hits a little bump and bounces, it slows you down.

 

[Man with no name]

 

 

Firstly' date=' I asked Dilbert for some specs on

the wheels:

 

 

 

Boras:

Mass=1305g, Stiffness front=53N/mm, stiffness rear=44N/mm Aerodynamics (watts

needed to turn wheel @ 50km/h)=23w

 

 

 

Zipp404: Mass=1252g, Stiffness front=61N/mm, Stiffness

rear=46N/mm Aerodynamics (watts needed to turn wheel @ 50km/h)=21.6w

 

 

 

So in terms of engineering, the Zipps have got a slim edge

on the Boras,

lighter, stiffer, more aero, but it is a very slim edge. In terms of

durability, it is difficult to draw a conclusion. I've heard of more broken

Zipps than broken Boras, but very few people

ride Boras, so

this is not a valid comparison. In terms of price, Zipp has a definite edge.

Zipp is also compatable with a powertap, with the Bora you have to use a SRM or

a polar. As far as style goes, the Boras

is the more unique wheel, and the G3 rear looks nice!

 

 

 

IMO if you have got Boras

already, and dont want to use a powertap, keep them. If you have not got deep

section currently, and want to buy new, go for the Zipp404's, the extra cost of

the Bora is not justified by its engineering.

 

[/quote']

 

 

 

1. Under what confidence levels were these tests undertaken?

In the real world no two people pump their tyres the same on race day, no two

people ride the exact same piece of road, so this whole debate is very much

hypothetical. Also, the guy with the Zipps, may have inferior tyres negating

the small benefit he may have gained from choosing the Zipps.

 

 

 

2. How would bruce?s bontragers compare against these two

sets?

 

 

 

Bruce' date=' the test I have seen (http://www.rouesartisanales.com/article-1503651.html)

found that tubbies had a RR of between 34 and 53 watt, and

the clinchers between 26 and 47, when inflated to the same

pressure. They do not list any numbers for tubbies inflated to a

higher pressure than the clinchers. They only state that tubbies with a

hard casing showed a dramatic improvement in RR when inflated over 140

psi.

 

 

 

Based on their test data, it does look like clinchers

have got a slightly lower RR at the same pressure, but no conclusion

can be made for  tubbies inflated to their max rating.

 

 

 

Have you got some better data?

 

[/quote']

 

 

 

I think the bolded section is the assumption that may sink

this comparison. Christie, is there some stats available depicting, graphically

RR against inflation (ie RR on the X, inflation on the Y). Showing two series,

one for Zipp one for Boras,

eg, now THAT will be interesting. My point is that one works with a lot of

dynamic variables and assumptions here and unless you can simulate reality on

race day the whole exercise is a bit

 

[Man with no name]

Did you know (some useless information for a Sunday afternoon)

 

Bora (Croatian: bura, Slovenian: burja) is a northern to north-eastern katabatic wind in the Adriatic, Greece, Russia and Turkey. Its name derives from the Greek mythological figure of Boreas, the North Wind.

 

A shamal is a summer northwesterly wind blowing over Iraq and the Persian Gulf, often strong during the day, but decreasing at night.^[1]

This weather effect occurs anywhere from once to several times a year.

The resulting wind typically creates large sandstorms that impact Iraq,

although most sand is picked up from Jordan and Syria.

 

Eurus, the east wind, was not associated with any of the three Greek seasons, and is the only one of these four Anemoi not mentioned in Hesiod's Theogony or in the Orphic Hymns.

 

The deities equivalent to the Anemoi in Roman mythology were the Vento (in Latin, "wind").

 

Now who says Campagnolo does not give careful consideration to naming their equipment?

 

[Man with no name]

Christie, the voices have a question for dilbert.....

 

Following the naked lap on the 24 hour this weekend.... how will the stats above be affected by said naked individual? Some of your clubmates are quite willing to repeat their endeavour for the purpose of this test

 

[Spinnekop]

Under all circumstance' date=' and providing you weigh sub 75kgs there is no wheel on the market that can beata mavic Ksyerium. Weights a bit more tha the zipp lasts far longer, The hubs are bullet proof and the rims indestructible.

 

I challenge anyone to prove different....

Shimano suck.... Rims are durable and strong but the hubsare sh*te

Zipp are just too expensive although it must be said there fast

 

[/quote']

 

Sorry boet.  Rode the SL's for a year...broke 2 spokes.  Had to be trued twice.

Rode the SSL (Silver) for a year....broke 2 spokes and the freewheel gave me crap.

 

Have the Campy Euros for 3 years now.  NO spokes broken.  Still 100% true.

 

 

[Christie]

1. Under what confidence levels were these tests undertaken? In the real world no two people pump their tyres the same on race day' date=' no two people ride the exact same piece of road, so this whole debate is very much hypothetical. Also, the guy with the Zipps, may have inferior tyres negating the small benefit he may have gained from choosing the Zipps.

 

2. How would bruce?s bontragers compare against these two sets?

[/quote']

1. The tests were all lab tests, with forces & deflections measured by electronic transducers, and the aerodynamic tests were done in a wind tunnel - I would say that the tests are accurate and repeatable as reasonably possible.

 

2.  The only Bontrager wheel in the test was the Race X Lite carbon aero. Is that the ones BPM ride? I would guess that the Bonti's are excellent wheels, they work together with HED, who shares the patent on the Zipp profile.

I think the bolded section is the assumption that may sink this comparison. Christie' date=' is there some stats available depicting, graphically RR against inflation (ie RR on the X, inflation on the Y). Showing two series, one for Zipp one for Boras, eg, now THAT will be interesting. My point is that one works with a lot of dynamic variables and assumptions here and unless you can simulate reality on race day the whole exercise is a bit

[/quote']

The tyre test is a completely seperate one, done by Continental from the looks of it, at a different time and place from the wheel test. It was also a lab test, using a rolling steel drum dyno and I assume the same rims, with different tyres all at the same pressure, so the only variable was the rolling resistance of the tyre. Christie2007-12-03 02:18:51

[Cruxpearl]

Hey!!!! Waaa Dilbert se report????!!!!!!! Grrrr!!!!!!

[ewep]

MWNN, you forgot about:

 

Sirocco, scirocco, jugo or, rarely, siroc is a Mediterranean wind that comes from the Sahara and reaches hurricane speeds in North Africa and Southern Europe. It is known locally as the qibli

 

[bob_the_builder]

 

MWNN' date=' you forgot about:

 

Sirocco, scirocco, jugo or, rarely, siroc is a Mediterranean wind that comes from the Sahara and reaches hurricane speeds in North Africa and Southern Europe. It is known locally as the qibli

 

[/quote']

 

So a Sirocco and a Ghibli are the same thing? But you use one on the road and one on the track

 

Or is a qibli and a ghibli not the same?

 

[fandacious]

interesting....

 

A shamal is a summer northwesterly wind blowing over Iraq and the Persian Gulf, often strong during the day, but decreasing at night.^[1] This weather effect occurs anywhere from once to several times a year. The resulting wind typically creates large sandstorms that impact Iraq, although most sand is picked up from Jordan and Syria.

[shade]

 

Ksyrium ES: Mass=1410g' date=' Stiffness front=56N/mm, Stiffness rear=47N/mm Aerodynamics (watts needed to turn wheel @ 50km/h)=33.2w

 

In terms of the stats, these are not good wheels. They look cool, though, but as far as clinchers go, for example, the Campy Eurus is much better.

 

(I asked Dilbert, he doesn't have data for the 202 or the 303, only the 808)

[/quote']

 

 Anything on the Corima's  ?

 

[Mark]

Does anyone rate the Easton's?

[Malkie]

Have to agree with Spinnekop,have had my eurus wheelset for about 3years,never had to be trued,never broken a spoke and they still spin forever,great wheels.

Malkie2007-12-03 09:56:24

[fandacious]

So... Eurus or shamals?